The server defines 3 tools with clear names and reasonable descriptions. Tool naming follows verb_noun convention (search_docs, list_docsets, init_docset). All tools have descriptions of 100+ characters. Schemas are present and define required parameters with type information. However, several critical gaps reduce the score: (1) Parameter descriptions lack detail on format constraints, regex syntax requirements, and edge cases. The 'pattern' parameter in search_docs has a very long description (200+ chars) that includes usage guidance, but other parameters are sparse. (2) Output schemas are completely undocumented, no specification of what search_docs returns (file paths? line numbers? structured objects?). (3) Error handling is not visible in tool definitions. (4) The server lacks tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite having clear semantic intent (init_docset is clearly a WRITE operation). (5) Composition is sound, tools are single-responsibility, but the lack of output documentation means downstream tool chaining cannot be assessed.

• Document output schemas for all tools. For search_docs: 'Returns an object { results: [{ file_path: string, line_number: number, matched_line: string, context_lines: string[] }] }'. For list_docsets: 'Returns an object { docsets: [{ id: string, name: string, source_type: string, initialized: boolean, updated_at: ISO8601 }] }'. For init_docset: 'Returns { success: boolean, message: string, docset_id: string }'.
• Add tool annotations to schemas. For search_docs and list_docsets: include 'readOnlyHint: true' in the schema root. For init_docset: include 'destructiveHint: true' and consider adding 'idempotentHint: false' if re-initialization has side effects.
• Convert prose constraints into JSON Schema fields. For search_docs.pattern: add 'minLength: 1' and 'pattern: '^[^\x00]+$'' (no null bytes). For context_lines: add 'minimum: 0, maximum: 100' (or appropriate upper bound).
• Add error handling documentation to tool descriptions. For search_docs: 'If docset_id is not found, returns { error: "docset_not_found", available_docsets: [...] }. If regex is invalid, returns { error: "invalid_regex", suggestion: "..." } with a corrected suggestion.' For init_docset: 'If initialization fails, returns { success: false, error: string, retry: boolean }. Retryable errors include network timeouts and rate limits. Non-retryable errors include invalid docset_id or insufficient disk space.'
• Clarify the purpose of list_docsets. Rewrite description: 'List all configured docsets with initialization status and metadata. Call this first to discover available documentation sources before searching. Returns docset names, types (git, web, local), initialized status, and last update timestamp.'